<template>
  <view>
    <view class="goods-list">
      <view v-for="(item, i) in goodsList" :key="i" @click="gotoDetail(item)">>
        <!-- 为 my-goods 组件动态绑定 goods 属性的值 -->
        <my-goods :goods="item"></my-goods>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        // 请求参数对象
        queryObj: {
        // 查询关键词
        query: '',
        // 商品分类Id
        cid: '',
        // 页码值
        pagenum: 1,
        // 每页显示多少条数据
        pagesize: 10
        },
        // 商品列表的数据
        goodsList: [],
        // 总数量，用来实现分页
        total: 0,
        defaultPic:'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png',
        isloading: false
      }
    },
    onLoad(options) {
      // 将页面参数转存到 this.queryObj 对象中
      this.queryObj.query = options.query || ''
      this.queryObj.cid = options.cid || ''
      this.getGoodsList()
    },
    methods: {
      gotoDetail(item) {
        uni.navigateTo({
          url: '/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
        })
      },
      async getGoodsList(cb) {
        this.isloading= true
        // 发起请求
        const { data: res } = await uni.$http.get('/api/public/v1/goods/search', this.queryObj)
        this.isloading= false
        cb && cb()
        if (res.meta.status !== 200) return uni.$showMsg()
        // 为数据赋值
        this.goodsList = [...this.goodsList, ...res.message.goods]
        this.total = res.message.total
      }
    },
    onReachBottom() {
      if (this.queryObj.pagenum * this.queryObj.pagesize >= this.total) return uni.$showMsg('数据加载完毕！')
      if (this.isloading) return
      // 让页码值自增 +1
      this.queryObj.pagenum += 1
      // 重新获取列表数据
      this.getGoodsList()
    },
    // 下拉刷新的事件
    onPullDownRefresh() {
      // 1. 重置关键数据
      this.queryObj.pagenum = 1
      this.total = 0
      this.isloading = false
      this.goodsList = []
      // 2. 重新发起请求
      this.getGoodsList(() => uni.stopPullDownRefresh())
    }
  }
</script>

<style lang="scss">
.goods-item {
  display: flex;
  padding: 10px 5px;
  border-bottom: 1px solid #f0f0f0;
  .goods-item-left {
    margin-right: 5px;
    .goods-pic {
      width: 100px;
      height: 100px;
      display: block;
    }
  }  .goods-item-right {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    .goods-name {
      font-size: 13px;
    }
    .goods-price {
      font-size: 16px;
      color: #c00000;
    }
  }
}
</style>
